The activities of antivivisectists have focused attention on the care of laboratory animals and the responsibilities of research workers with respect to experiments on animals. Recent developments, making possible the transfer of parts of one human body to another and the preservation of such parts in "banks," have provoked a growing interest in organ transplants and autopsy procedures. Over and above all this run increasing doubts and uncertainties as to the legal and ethical aspects of the whole problem of human and animal experimentation. For a number of years the National Society for Medical Research has studied these questions. One outgrowth of this interest was the conference here reported, which was held last under the joint sponsorship of the society and the University of Chicago. The deliberations were organized into sessions on the use of cadavers, organ transplants, and autopsy procedures; the care and use of laboratory animals; and legal